World Solve — A living repository of problems worth solving.

What World Solve is

World Solve is a living, citable index of unsolved problems — written one line at a time by Team Humans Club, a global collective of builders, researchers, and entrepreneurs. We do not solve the problems here. We Democratize Innovation.

For builders Skip the search for a problem worth your time. Browse a vetted, growing list and start where the gap is real.

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We don't know whether every knot can be told apart from every other knot using a simple, efficient test.

open Global / Unspecified, Global

Mathematicians have many tools for distinguishing knots, but no single method works perfectly and efficiently for every possible case. This unsolved problem sits at the heart of the mathematical field of knot theory.

every knot know whether told mathematics-logic

WS01239 · Logged by The Internet (anon_1904) on 2026-07-19T16:18:35Z · Working on: 0

Citation ID: WS01239 Title: We don't know whether every knot can be told apart from every other knot using a simple, efficient test. URL: https://worldsolve.org/index.php?api=problem&id=1239

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1355 public problems
1355 open challenges
0 solved entries
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